* {
	margin: 0px auto;
	padding: 0px;
}

.population{
	width: 600px;
	height: 300px;
	margin-left: 400px;
	margin-top: 10px;
	background-color: aliceblue;
}

.population .top{
	width: 600px;
	height: 60px;
	text-align: center;
}

.population .middle{
	width: 600px;
	height: 150px;
	margin-top: 30px;
}

.population .middle span{
	margin-left: 20px;
	margin-top: 50px;
	font-size: 18px;
}

.population .middle input{
	margin-left:60px;
	width: 300px;
	height: 30px;
}

.population .middle #errLoginInfo{
	margin-left:180px ;
	width: 300px;
	height: 30px;
}

.population .last{
	width: 400px;
	height: 60px;
	margin-left: 100px;
	padding: 10px;
}

.population .last button{
	margin-left: 100px;
	width: 50px;
	height: 30px;
}

.population .randomNumer{
	width: 400px;
	height: 60px;
	margin-left: 100px;
	padding: 10px;
}